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Protection
Protection Part Operation
SKF Multilog On-Line System IMx-M
2 - 37
User Manual
PRM Circuit Faults
If any bit representation of PRM circuit faults is not 0x0000, then the PRM circuit fault
relay will be triggered and the PRM circuit fault LED will be ON indicating a circuit fault.
For PRM master bit representations, refer to the table "Protection Module Circuit
Faults - PRM-Master", below to decode circuit fault condition(s).
For PRM slaves 0 to 7 bit representations, refer to the table "Protection Module
Circuit Faults - PRM-S0 to PRM-S7", below to decode circuit fault condition(s).
Table 2-8: Protection module circuit faults - PRM-M.
Protection Module Circuit Faults - PRM-Master
Bit representation
1
Condition
Comments
(0x0000)
(No bit set)
CF_STATUS_OK
Normal. No errors.
0x0001
CF_CONFIG
User configuration dependent:
Check IMx-M configuration settings.
Check the PRM position.
0x0002
CF_RS485INT
Internal RS485 communication error - check that modules
are firmly positioned:
Master and slave may have different FW versions in use -
check the current FW version in use (intd0) on both master
and slave.
Also check the FW version of CMM.
0x0004
CF_CFG_MISMATCH
Configuration mismatch detected:
See "
Protection Configuration Update
" chapter.
0x0008
CF_SELFTEST
Check for self test errors during startup.
0x0010
CF_DOWNLOAD
Download mode.
0x0020
CF_MODBUS
Check RS485 L1
–
L2.
0x0040
CF_4-20MA
Check 4-20 mA outputs.
Check that CMM/PRM is firmly positioned
0x0080
CF_SPI
Check that CMM/PRM is firmly positioned
0x0100
CF_24VA
PSU 1 voltage failure:
User configuration dependent.
Check IMx-M configuration settings.
Check that PSU 1 is firmly positioned.
0x0200
CF_24VB
PSU 2 voltage failure:
User configuration dependent.
Check IMx-M configuration settings.
Check that PSU 2 is firmly positioned.
0x0400
CF_CALIB2
Calibration table error: